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US 4,049,640 AGranted
Substituted bisnaphthylazo diphenyl ureido complement inhibitors
AssigneeAmerican Cyanamid Company
InventorsRansom Brown Conrow, Seymour Bernstein, Norman Bauman
Life of this patent
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Abstract
[Ureylenebis-(carboxy-phenyleneazo)]bis[amino-hydroxy-naphthoic acids] and salts useful as complement inhibitors.
Claims3
A compound selected from those of the formula:
- ##STR3## wherein A is H, Na or K, with the proviso that A is identical in the same compound.
A compound selected from those of the formula:
- ##STR4## wherein A is H, Na or K, with the proviso that A is identical in the same compound.
A compound to claim 2, 5,5'-[ureylenebis (2-carboxy-p-phenyleneazo)[bis]6-amino-[4-hydroxy-2-naphthoic acid], tetrasodium salt.
Dependencies are inferred from the claim text.